KR101320127B1 - Purifier for lubricating oil in rolling mill - Google Patents

Abstract

The present invention relates to a lubricating oil purification device for rolling mills, and more particularly, to a lubricating oil purification device for rolling mills capable of effectively removing the cooling water contained in the lubricating oil.
The present invention relates to an oil tank in which lubricating oil supplied to a bearing is circulated along an oil supply pipe and an oil supply pipe, an auxiliary tank connected to an oil tank by a supply pipe and an exhaust pipe, and a drain pipe is installed, a pump installed in the supply pipe, and an exhaust pipe. A first valve to be installed, a second valve to be installed in the drain pipe, a moisture sensor to detect moisture remaining in the auxiliary tank, an oil sensor to detect the amount of oil contained in the auxiliary tank, a moisture sensor or It provides a lubricating oil purification device for a rolling mill including a control unit for determining whether the pump, the first valve and the second valve in accordance with the signal transmitted from the oil sensor.

Description

Lubricant Purifier for Rolling Mills {PURIFIER FOR LUBRICATING OIL IN ROLLING MILL}

The present invention relates to a lubricating oil purification device for rolling mills, and more particularly, to a lubricating oil purification device for rolling mills capable of effectively removing the cooling water contained in the lubricating oil.

Typical steelmaking consists of a steelmaking process to produce molten iron, a steelmaking process to remove impurities from molten iron, a casting process to solidify the liquid iron, and a rolling process to make iron into steel or wire.

The casting process is a process in which liquid molten steel is injected into a mold and then cooled and solidified while passing through a continuous casting machine to continuously produce an intermediate material such as a slab or a bloom.

In this process, the bloom is converted into a billet (Billet) again through a rolling mill, and processed into a wire rod through a wire mill.

Further, the slab is produced as a heavy plate through a plate rolling mill or as a hot rolled coil or a hot rolled steel plate while passing through a hot rolling mill.

The rolling mill which performs the rolling process is installed so that a pair of work rollers may maintain a space | interval in a vertical direction, and the backup roller which provides a pressing force to a work roller is installed in the upper part and the lower part of a work roller.

Since the backup roller rotates while supporting a high load, a lubricating oil purifier is installed in the bearing installed on the rotating shaft of the backup roller.

Background art of the present invention is disclosed in Republic of Korea Patent Publication No. 10-2003-0035549 (published May 9, 2003, the name of the invention: reinforcing roll choke lubrication device for cold rolling).

An object of the present invention is to provide a lubricating oil purification device for a rolling mill that can effectively remove the coolant contained in the lubricating oil.

In order to achieve the above object, the present invention, the oil tank lubricating oil supplied to the bearing is circulated along the oil supply pipe and the drain pipe; An auxiliary tank connected to the oil tank by a supply pipe and a discharge pipe and installed with a drain pipe; A pump installed in the supply pipe; A first valve installed in the discharge pipe; A second valve installed on the drain pipe; A moisture detection sensor for sensing moisture remaining in the auxiliary tank; An oil detection sensor for detecting an amount of oil contained in the auxiliary tank; And a controller configured to determine whether the pump, the first valve, and the second valve are operated according to a signal transmitted from the moisture detection sensor or the oil detection sensor. .

In addition, the moisture detection sensor, the first moisture detection sensor is installed in the lower portion of the auxiliary tank to maintain a distance from the bottom surface of the auxiliary tank; And a second moisture detection sensor installed at a bottom surface of the auxiliary tank.

The oil detection sensor may further include a first oil detection sensor installed at an upper portion of the auxiliary tank; And a second oil detection sensor installed between the first oil detection sensor and the first moisture detection sensor.

In addition, the oil supply pipe is characterized in that the oil and water separator for separating the water and lubricating oil is installed.

In addition, the present invention, (a) determining whether the amount of oil contained in the auxiliary tank connected to the supply pipe and the discharge pipe to the oil tank circulating the lubricating oil of the bearing is less than the first set value; (b) opening the discharge pipe to supply the oil contained in the oil tank to the auxiliary tank when the amount of oil is less than the first set value; (c) determining whether the amount of oil contained in the auxiliary tank exceeds a first set value when the oil is supplied to the auxiliary tank and is greater than or equal to a second set value; (d) closing the discharge pipe if the amount of oil contained in the auxiliary tank is equal to or greater than a second set value; (e) determining whether water is sensed at the bottom of the auxiliary tank when the discharge pipe is closed; (f) discharging water by opening a drain pipe of the auxiliary tank when water is detected at the bottom of the auxiliary tank; (g) determining whether discharge of the water from the auxiliary tank is completed when the drain pipe is opened; And (h) closing the drain pipe and supplying the lubricating oil contained in the auxiliary tank to the oil tank when the discharge of water from the auxiliary tank is completed. do.

The lubricating oil purification device for a rolling mill according to the present invention can effectively remove moisture from the lubricating oil supplied to the bearing of the backup roller, thereby preventing the damage of the bearing caused by the lack of lubricating oil.

1 is a block diagram showing a lubricating oil purification device for a rolling mill according to an embodiment of the present invention.
2 is a cross-sectional view showing a lubricating oil purification device for a rolling mill according to an embodiment of the present invention.
3 is a flowchart illustrating a control method of a lubricating oil purification device for a rolling mill according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a lubricating oil purification device for a rolling mill according to the present invention.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator.

Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a block diagram showing a lubricating oil purification device for a rolling mill according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing a lubricating oil purification device for a rolling mill according to an embodiment of the present invention.

1 and 2, the lubricating oil purification device for a rolling mill according to an embodiment of the present invention, the oil tank 80, the lubricating oil supplied to the bearing is circulated along the oil supply pipe (80a) and the oil pipe (80b) And an auxiliary tank 90 connected to the oil tank 80 by a supply pipe 90a and a discharge pipe 84 and provided with a drain pipe 90b, a pump 86 installed in the supply pipe 90a, and a discharge pipe ( A first valve 84a installed at the 84, a second valve 92 installed at the drain pipe 90b, moisture detection sensors 102 and 104 which detect moisture remaining in the auxiliary tank 90, Oil pumps 106 and 107 for detecting the amount of oil contained in the auxiliary tank 90, and pumps 86 according to signals transmitted from the moisture sensors 102 and 104 or the oil sensors 106 and 107. ), And a control unit for determining whether the first valve 84a and the second valve 92 are operated.

Since the cooling water is injected to cool the object of the rolling process during the rolling process, water may flow into the bearing of the backup roller 50. In this embodiment, the lubricating oil of the bearing is circulated to the oil tank 80. , The lubricant contained in the oil tank 80 is circulated to the auxiliary tank 90 to remove moisture contained in the lubricant.

The rotating shaft of the backup roller 50 is inserted into the block 52 slidably installed on the stand 10, and a bearing is installed between the rotating shaft and the block 52.

In the block 52, the oil supply pipe 80a and the oil supply pipe 80b connected to the oil tank 80 are installed, so that the lubricating oil of the bearing is circulated to the oil tank 80.

The lower portion of the oil tank 80 and the auxiliary tank 90 is connected to the discharge pipe 84, the first valve 84a is installed in the discharge pipe 84, so when the first valve 84a is opened, the oil tank 80 Water and oil located at the bottom of the feed are supplied to the auxiliary tank (90).

Since the auxiliary tank 90 is provided with oil detection sensors 106 and 107 for detecting the amount of oil, the amount of oil contained in the auxiliary tank 90 by the operation of the oil detection sensors 106 and 107 is the first set value. When it is detected that less than or equal to the operating signal transmitted from the control unit the first valve (84a) is opened and the oil and water contained in the oil tank 80 is supplied to the auxiliary tank (90).

Subsequently, when it is detected that the amount of oil contained in the auxiliary tank 90 is greater than or equal to the second set value by the operation of the oil detecting sensors 106 and 107, the first valve 84a is closed in accordance with an operation signal transmitted from the controller. Then, the second valve 92 provided in the drain pipe 90b is opened to discharge moisture.

In addition, the auxiliary tank (90) is provided with moisture detection sensors (102, 104) for detecting the amount of water, so that when the water discharge is completed from the auxiliary tank (90) by the operation of the moisture detection sensors (102, 104) The second valve 92 is closed by the operation signal transmitted from the controller, and the pump 86 is driven to circulate the oil contained in the auxiliary tank 90 to the oil tank 80.

The moisture detection sensors 102 and 104 may include a first moisture detection sensor 102 installed at a lower portion of the auxiliary tank 90, and a second moisture detection sensor 104 installed at a bottom surface of the auxiliary tank 90. Include.

When oil and water are supplied to the auxiliary tank 90, the oil and water are separated by the difference in specific gravity, so that the water is positioned in the lower portion of the auxiliary tank 90. It is determined that the separation is completed, the second valve 92 is opened.

When the second valve 92 is opened and the discharge of the water is completed, the second valve 92 is closed because water is not detected by the second moisture sensor 104 installed on the bottom surface of the auxiliary tank 90. Stopping the discharge, the pump 86 is driven to circulate the oil contained in the auxiliary tank 90 to the oil tank (80).

The oil detection sensors 106 and 107 are installed between the first oil detection sensor 106 and the first oil detection sensor 106 and the first moisture detection sensor 102 installed on the upper portion of the auxiliary tank 90. The second oil detection sensor 107 is included.

Since the second oil sensor 107 is installed under the auxiliary tank 90, if no oil is detected by the second oil sensor 107, the amount of oil contained in the auxiliary tank 90 is determined to be less than or equal to the first set value. Done.

In addition, since the first oil sensor 106 is installed above the auxiliary tank 90, when oil is detected by the first oil sensor 106, the amount of oil contained in the auxiliary tank 90 is greater than or equal to the second set value. You will be judged.

Therefore, the control unit drives the first valve 84a or the pump 86 according to the signals transmitted from the first oil sensor 106 and the second oil sensor 107 so that the oil in the oil tank 80 is stored in the auxiliary tank. Allow circulation to (90).

The oil detection sensors 106 and 107 and the moisture detection sensors 102 and 104 are sensors capable of detecting oil or moisture by air, moisture, and current conduction performance differences between oils, which recognizes the technical configuration of the present invention. Since it will be easily implemented by those skilled in the art, specific drawings or descriptions will be omitted.

Since the oil-water separator 82 separating water and lubricant oil is installed in the oil supply pipe 80a, water is removed from the lubricant oil supplied to the bearing from the oil tank 80 to supply the lubricant with high purity.

Reference numeral 12 is a motor 12, 14 is a speed reducer 14 for decelerating and transmitting power of the motor, and 30 is a rolling roller 30 performing a rolling process.

Looking at the control method of the lubricating oil purification device for rolling mill according to an embodiment of the present invention configured as described above are as follows.

3 is a flowchart illustrating a control method of a lubricating oil purification device for a rolling mill according to an embodiment of the present invention.

1 to 3, the control method of the lubricating oil purification device for a rolling mill according to an embodiment of the present invention, is connected to the supply pipe 90a and the discharge pipe 84 to the oil tank 80 through which the lubricating oil of the bearing is circulated Determining whether the amount of oil contained in the auxiliary tank 90 is less than or equal to the first set value, and when the amount of oil is less than or equal to the first set value, opening the discharge pipe 84 to supply the oil contained in the oil tank 80 to the auxiliary tank; Supplying to the 90, determining whether the amount of oil contained in the auxiliary tank 90 is greater than or equal to a second set value when oil is supplied to the auxiliary tank 90, and oil contained in the auxiliary tank 90. Closing the discharge pipe 84 when the amount is equal to or greater than the second set value, determining whether water is sensed at the bottom of the auxiliary tank 90 when the discharge pipe 84 is closed, and at the bottom of the auxiliary tank 90. When the water is detected by opening the drain pipe (90b) of the auxiliary tank 90 to discharge the water When the drain pipe (90b) is opened, the step of judging whether the discharge of water from the auxiliary tank (90) is complete, and when the discharge of water from the auxiliary tank (90) is completed, close the drain pipe (90b) and the auxiliary tank (90) Supplying the lubricating oil contained in the oil tank (80).

Since the lubricating oil of the bearing is circulated to the oil tank 80 and the oil is not detected by the second oil sensor 107, the detection signal is transmitted to the control unit. The discharge pipe 84 is opened by transmitting an open signal to the first valve 84a after determining that it is equal to or less than one set value.

When the discharge pipe 84 is opened, oil and water are supplied to the auxiliary tank 90 so that the level of the oil tank 80 and the auxiliary tank 90 are equal by gravity.

When oil is detected by the first oil sensor 106 while oil is supplied to the auxiliary tank 90, a detection signal is transmitted to the controller, and the amount of oil contained in the auxiliary tank 90 is greater than or equal to the second set value by the controller. It is determined that the closing signal is transmitted to the first valve (84a), the discharge pipe 84 is closed.

When the oil supply to the auxiliary tank 90 is completed and a predetermined time elapses, the water is disposed under the auxiliary tank 90 due to the difference in specific gravity. When moisture is detected by the first moisture detection sensor 102, a detection signal is sent to the controller. The controller determines that separation of water and oil is completed by the controller and opens the second valve 92.

When the drain pipe 90b is opened by the operation of the second valve 92, water is discharged from the bottom surface of the auxiliary tank 90, and when water is not detected by the second water level sensor while the water is being discharged, Since the detection signal is transmitted, the controller determines that the water discharge is completed, and transmits the closing signal to the second valve 92, and transmits the operation signal to the pump 86.

The lubricating oil contained in the auxiliary tank 90 is re-supplied to the oil tank 80 along the supply pipe 90a by the operation of the pump 86, and the lubricating oil supplied to the bearing along the oil supply pipe 80a is oil-water separator 82. After passing through), water is supplied to the bearing after the water is removed secondarily.

Thereby, it becomes possible to provide the lubricating oil purification apparatus for rolling mills which can remove the cooling water contained in lubricating oil effectively.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

In addition, the lubricating oil purification device for a rolling mill and its control method have been described as an example, but this is merely exemplary, and the purifying device and the control method of the present invention may be used for other products other than the lubricating oil purification device for a rolling mill and its control method. have.

Accordingly, the true scope of the present invention should be determined by the following claims.

10: stand 12: motor
14: reducer 30: rolling roller
50: backup roller 52: block
80: oil tank 80a: oil supply pipe
80b: oil pipe 82: oil and water separator
84: discharge pipe 84a: first valve
86: pump 90: auxiliary tank
90a: supply pipe 90b: drain pipe
92: second valve 102: the first moisture detection sensor
104: second moisture detection sensor 106: first oil detection sensor
107: second oil detection sensor

Claims (5)

An oil tank through which lubricating oil supplied to the bearing is circulated along the oil supply pipe and the oil supply pipe;
An auxiliary tank connected to the oil tank by a supply pipe and a discharge pipe and installed with a drain pipe;
A pump installed in the supply pipe;
A first valve installed in the discharge pipe;
A second valve installed on the drain pipe;
A moisture detection sensor for sensing moisture remaining in the auxiliary tank;
An oil detection sensor for detecting an amount of oil contained in the auxiliary tank; And
And a control unit for determining whether the pump, the first valve, and the second valve are operated according to a signal transmitted from the water detection sensor or the oil detection sensor.
The method of claim 1, wherein the moisture sensor,
A first moisture sensor installed at a lower portion of the auxiliary tank so as to maintain a distance from a bottom surface of the auxiliary tank; And
Lubricating oil purification device for a rolling mill, characterized in that it comprises a second moisture sensor installed on the bottom surface of the auxiliary tank. According to claim 2, The oil sensor,
A first oil detection sensor installed at an upper portion of the auxiliary tank; And
Lubricating oil purification device for a rolling mill, characterized in that it comprises a second oil sensor installed between the first oil sensor and the first moisture sensor.
The method of claim 1,
The oil supply pipe is a lubricating oil purification device for a rolling mill, characterized in that the oil and water separator for separating water and lubricating oil is installed.
(a) determining whether the amount of oil contained in the auxiliary tank connected to the supply pipe and the discharge pipe to the oil tank through which the lubricating oil of the bearing is circulated is less than or equal to the first set value;
(b) opening the discharge pipe to supply the oil contained in the oil tank to the auxiliary tank when the amount of oil is less than the first set value;
(c) determining whether the amount of oil contained in the auxiliary tank exceeds a first set value when the oil is supplied to the auxiliary tank and is greater than or equal to a second set value;
(d) closing the discharge pipe if the amount of oil contained in the auxiliary tank is equal to or greater than a second set value;
(e) determining whether water is sensed at the bottom of the auxiliary tank when the discharge pipe is closed;
(f) discharging water by opening a drain pipe of the auxiliary tank when water is detected at the bottom of the auxiliary tank;
(g) determining whether discharge of the water from the auxiliary tank is completed when the drain pipe is opened; And
(h) when the discharge of the water from the auxiliary tank is completed, the closing of the drain pipe and supplying the lubricating oil contained in the auxiliary tank to the oil tank.

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